Dmitri Medvedev (Wikipedia) – Russian Prime Minister
“In August 2014, Anonymous International released archives from three different email accounts allegedly belonging to Dmitri Medvedev, as well as correspondence from Duma deputy and United Russia member Robert Shlegel about an organized “troll” attack on the websites of major American and British news media (including The New York Times, CNN, the BBC, USA Today, and The Huffington Post).”
Original source of above quote: Meduza 2015
Seems like Anonymous International is the English-language name for Shaltai Boltai (Humpty Dumpty), which is the source of the above leaks.
“A group known as Anonymous International or Shaltai-Boltai has revealed, time after time, e-mails and other confidential documents from the domestic policy department of President Vladimir Putin’s administration, as well as those belonging to ministers and aides to Prime Minister Dmitri Medvedev and Moscow Mayor Sergei Sobyanin.”
“Dmitry Medvedev, Putin’s protégé who was president from 2008–12, made a show of embracing social media, but it never sat well with officials and Putin supporters. The gulf between Medvedev’s transparency drive and Russia’s Byzantine bureaucracy’s reluctance to change only highlighted his impotence, earning him the nickname “Microblogger” for his small stature.”